Writing books for Blizzard

Greetings, all.

I have always wanted to write a story for StarCraft’s library, and recently began writing one I would like to present to Blizzard, in the hopes that it can be published some day. I’ve never written professionally, but I’d at least like to send some of the material I’ve written to Blizzard, to see what they think of it and whether it meets their criteria for being included in official canon. I’ve been a fan of StarCraft since about 1998, and have always loved the stories woven through the years, especially Liberty’s Crusade. What would be the first step to reaching out to Blizzard?

Thank you all for any help you have to offer.